// <copyright file="FoveationApi.cs" company="Google LLC">
//
// Copyright 2024 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// </copyright>
//-----------------------------------------------------------------------

namespace Google.XR.Extensions.Internal
{
    using System;
    using System.Runtime.InteropServices;

    internal class FoveationApi
    {
        public static void FBSetFoveationLevel(
            ulong xrSession, XRFoveationLevel foveationLevel,
            float verticalOffset, bool foveationDynamic)
        {
            ExternalApi.FBSetFoveationLevel(
                xrSession, (int)foveationLevel, verticalOffset, foveationDynamic ? 1 : 0);
        }

        private struct ExternalApi
        {
            [DllImport("UnityOpenXR")]
            public static extern int FBSetFoveationLevel(
                ulong session, int level, float verticalOffset, int dynamic);
        }
    }
}
